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Financial Statement Presentation New Accounting Pronouncement Adopted (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Total Revenue | $ 2,837 | $ 2,693 | $ 8,114 | $ 7,887 |  |  |
Cost of Goods and Services Sold | (2,166) | (2,053) | (6,187) | (6,067) |  |  |
Operating margin | 671 | 640 | 1,927 | 1,820 |  |  |
Interest income | 79 | 63 | 231 | 185 |  |  |
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES | 332 | 304 | 1,672 | 687 |  |  |
Income tax expense | 146 | 93 | 509 | 246 |  |  |
INCOME FROM CONTINUING OPERATIONS | 192 | 235 | 1,194 | 474 |  |  |
NET INCOME | 191 | 261 | 1,384 | 509 |  |  |
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION | 101 | 152 | 1,075 | 181 |  |  |
Other current assets | 706 |  | 706 |  | $ 691 | $ 630 |
Deferred income taxes | 88 |  | 88 |  | 106 | 130 |
Service concession assets, net | 0 |  | 0 |  | 0 | 1,360 |
Loan receivable | 1,441 |  | 1,441 |  | 1,490 | 0 |
TOTAL ASSETS | 32,489 |  | 32,489 |  |  | 33,112 |
Accrued and other liabilities | 1,151 |  | 1,151 |  |  | 1,232 |
Accumulated deficit | (1,133) |  | (1,133) |  | (2,209) | (2,276) |
Accumulated other comprehensive loss | (2,020) |  | (2,020) |  | (1,857) | (1,876) |
NONCONTROLLING INTERESTS | 2,404 |  | 2,404 |  | 2,461 | 2,380 |
TOTAL LIABILITIES AND EQUITY | 32,489 |  | 32,489 |  |  | 33,112 |
Cash and Cash Equivalents, at Carrying Value | (1,187) |  | (1,187) |  |  | (949) |
Restricted Cash and Cash Equivalents, Current | (441) |  | (441) |  |  | (274) |
Other Restricted Assets, Noncurrent | (494) |  | (494) |  |  | (565) |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 2,122 | 2,298 | 2,122 | 2,298 |  | $ 1,788 | $ 1,960
ASC 606 Impact [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Total Revenue | (18) |  | (54) |  |  |  |
Cost of Goods and Services Sold | 14 |  | 40 |  |  |  |
Operating margin | (4) |  | (14) |  |  |  |
Interest income | 15 |  | 45 |  |  |  |
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES | 11 |  | 31 |  |  |  |
Income tax expense | 1 |  | 0 |  |  |  |
INCOME FROM CONTINUING OPERATIONS | 12 |  | 31 |  |  |  |
NET INCOME | 12 |  | 31 |  |  |  |
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION | 12 |  | 31 |  |  |  |
Other current assets | 65 |  | 65 |  | 61 |  |
Deferred income taxes | (24) |  | (24) |  | (24) |  |
Service concession assets, net | (1,287) |  | (1,287) |  | (1,360) |  |
Loan receivable | 1,441 |  | 1,441 |  | 1,490 |  |
TOTAL ASSETS | 195 |  | 195 |  |  |  |
Accumulated deficit | 98 |  | 98 |  | 67 |  |
Accumulated other comprehensive loss | 18 |  | 18 |  | 19 |  |
NONCONTROLLING INTERESTS | 79 |  | 79 |  | $ 81 |  |
TOTAL LIABILITIES AND EQUITY | 195 |  | 195 |  |  |  |
Balance Without the Adoption of ASC 606 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Total Revenue | 2,855 |  | 8,168 |  |  |  |
Cost of Goods and Services Sold | (2,180) |  | (6,227) |  |  |  |
Operating margin | 675 |  | 1,941 |  |  |  |
Interest income | 64 |  | 186 |  |  |  |
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES | 321 |  | 1,641 |  |  |  |
Income tax expense | (147) |  | (509) |  |  |  |
INCOME FROM CONTINUING OPERATIONS | 180 |  | 1,163 |  |  |  |
NET INCOME | 179 |  | 1,353 |  |  |  |
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION | 89 |  | 1,044 |  |  |  |
Other current assets | 641 |  | 641 |  |  |  |
Deferred income taxes | 112 |  | 112 |  |  |  |
Service concession assets, net | 1,287 |  | 1,287 |  |  |  |
Loan receivable | 0 |  | 0 |  |  |  |
TOTAL ASSETS | 32,294 |  | 32,294 |  |  |  |
Accumulated deficit | (1,231) |  | (1,231) |  |  |  |
Accumulated other comprehensive loss | (2,038) |  | (2,038) |  |  |  |
NONCONTROLLING INTERESTS | 2,325 |  | 2,325 |  |  |  |
TOTAL LIABILITIES AND EQUITY | $ 32,294 |  | $ 32,294 |  |  |  |
Accounting Standard Update 2016-09 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  | 327 |  | 327 |  |  |
Inc (Dec) in Cash provided by Operating Actitvities [Domain] | Accounting Standard Update 2016-09 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  | 12 |  | 12 |  |  |
Dec (Inc) In Net Cash Used by Financing Activities [Domain] | Accounting Standard Update 2016-09 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  | $ 0 |  | $ 0 |  |  |
Other Expense [Member] | Accounting Standards Update 2017-07 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted |  | 2 |  | 1 |  |  |

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